CN110317651B - Method for producing clean formed coke based on alumina transition state binder - Google Patents
Method for producing clean formed coke based on alumina transition state binder Download PDFInfo
- Publication number
- CN110317651B CN110317651B CN201910460314.2A CN201910460314A CN110317651B CN 110317651 B CN110317651 B CN 110317651B CN 201910460314 A CN201910460314 A CN 201910460314A CN 110317651 B CN110317651 B CN 110317651B
- Authority
- CN
- China
- Prior art keywords
- alumina
- coal
- state binder
- transition state
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/12—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with inorganic binders
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Coke Industry (AREA)
Abstract
A method for producing clean formed coke based on an alumina transition state binder comprises the steps of selecting silica, limestone and coal liquefaction residues, respectively crushing, adding alumina, metakaolin and pregelatinized starch, uniformly stirring and mixing, and then carrying out dry grinding to obtain the alumina transition state binder; selecting blended coal, uniformly mixing the blended coal and the alumina transition-state binder according to the proportion, carrying out cold press molding, carrying out dry distillation in a vertical dry distillation furnace, discharging the red hot furnace charge, and cooling to normal temperature through a coke quenching process to obtain clean formed coke; the raw materials of the invention have wide and rich sources and low price, and the invention has the effects of the cold-state binder and the hot-state binder, and has the binding effect before the cold-state binder fails and the hot-state binder acts in the pyrolysis process, thereby ensuring the forming rate and the formed coke strength of the materials in the dry distillation furnace.
Description
Technical Field
The invention relates to a production method of clean formed coke, and also relates to a binder used for producing the clean formed coke, in particular to an alumina transition state binder used for producing the clean formed coke, and a preparation method and application thereof.
Background
Some special primary energy sources rich in coal, lean oil and little gas determine that coal combustion is the main mode for obtaining energy sources for a long time at present and even in future, but dust, sulfur dioxide, nitrogen oxides and the like discharged by direct combustion of a large amount of coal cause serious harm to the atmospheric environment, so that the atmospheric environment is seriously polluted and the haze weather is frequent; if the amount of coal for civil free burning is 1.6 million tons counted in 2014 in China, the coal only accounts for 3.8 percent of the amount of coal for national use, the annual emission amount of a power plant is 200 million tons by taking sulfur dioxide emission as an example, and the amount of the civil free burning is up to 320 million tons, which is 1.6 times of the total emission amount of the power plant; in addition, a series of problems such as smoke pollution, nitrogen oxide pollution, ash pollution and the like of civil bulk coal are immeasurable to damage of ecological environment, however, the problems are influenced by factors such as regions, economy, culture and the like, the problem of coal pollution in rural areas and small towns is very difficult to solve, and it is urgent to provide high-quality, low-price and clean alternative fuels for the areas.
And the power coal used as fuel mainly comprises low-rank coal, and with the improvement of the mechanization degree of coal mining, the proportion of slack coal is larger and larger in the mining process, and how to efficiently utilize the slack coal is more and more emphasized.
The clean formed coke is a clean solid fuel which is prepared by using low-rank slack coal as a main material and assisting a small amount of sulfur-fixing agent, combustion improver, binder and the like, performing and then performing dry distillation at medium temperature by using the existing semi-coke plant production equipment, and has the advantages of high forming rate, good strength, low volatilization, low sulfur emission, difficult slag bonding and the like, and tail gas can meet the national emission standard without a desulfurization facility; and the fuel is easy to ignite, strong in fire-sustaining capability, high in temperature rise speed and long in combustion duration, and is an ideal fuel for various civil life stoves.
At present, the pulverized coal molding dry distillation method has few patents, for example, in the publication No. CN106635217A, coal liquefaction residues are used as cold and hot state binders of the pulverized coal molding dry distillation method to be directly mixed with the pulverized coal for molding and dry distillation; in the publication No. CN106701133A, asphalt and tar residues are used as adhesives to be mixed with pulverized coal and then are subjected to dry distillation to obtain formed coke; in the publication No. CN106753496A, tar residue is used as a basic adhesive, and corn flour and inorganic magnesium salt are mixed, molded and then dry distilled; in the patent formula for preparing the formed coke, the binder mainly comprises the steps of acting a cold binder in a cold forming process at a temperature below 200 ℃ and acting a hot binder in a dry distillation process at a temperature above 400 ℃, but in the actual dry distillation process, the cold binder fails at a temperature between 200 and 400 ℃, and the hot binder does not act, so that the problem of high medium coke breakage rate in the dry distillation process is caused by lack of the use of the transition binder in the temperature range.
Through retrieval, no report is found on the alumina transition state binder used for producing clean formed coke.
Disclosure of Invention
The invention aims to solve the specific technical problems that the phase that the cold-state binder fails at 200-400 ℃ and the hot-state binder does not act exists in the dry distillation process of the binder for producing the clean formed coke, and the broken rate of the formed coke is high in the dry distillation process due to the lack of the use of the transition-state binder in the temperature range.
In order to achieve the above object, the present invention adopts the following technical solutions.
A method for producing clean formed coke based on alumina transition state binder is characterized in that: the method for producing the clean formed coke is carried out according to the following steps:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O3Not less than 98.4wt%, metakaolin: lime and silica SiO with activity not less than 1000 mg/g2Not less than 96wt%, pregelatinized starch: viscosity is more than or equal to 600mPa.s, limestone CaO is more than or equal to 51wt%, and coal liquefaction residue: the residual oil and the asphaltene are more than or equal to 60 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 5-20 parts of crushed silica, 10-20 parts of limestone and 50-60 parts of coal liquefaction residues, and further weighing 20-30 parts of alumina, 5-10 parts of metakaolin and 10-20 parts of pregelatinized starch, mixing the materials together in sequence, and stirring and mixing the materials uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the quality indexes of the selected blended coal are as follows: dry ashless based volatile VdafNot less than 25 percent, dry basis ash content AdLess than or equal to 15 percent, fixed carbon FC on dry basisdNot less than 55% dryRadical sulfur St,d＜1.5%；
Sixthly, crushing the blended coal to be-3 mm, uniformly mixing the crushed blended coal with the alumina transition state binder, performing cold press molding, selecting the molding pressure to be 10-15MPa, enabling the molded coal strength to be more than 800N/ball under the molding pressure, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 600 plus materials and 900 ℃, enabling the dry distillation time to be 2-4h, discharging the red hot furnace burden out of the furnace, and cooling the red hot furnace burden to normal temperature through a coke quenching process to obtain the clean molded coke.
Wherein the main strength indexes of the clean formed coke are as follows: the compressive strength is 800N/ball-2000N/ball, the forming rate is more than 80 percent, and the final rate is less than 10 percent.
In the technical scheme, the aluminum oxide, the direct coal liquefaction residue, the limestone and the starch are compounded to produce the clean formed coke, the functions of the clean formed coke are mainly represented by triple functions of a cold-state binder, a hot-state binder and a transition-state binder, the traditional formed coke binder only considers the cold-state binder, the cold-state starch binder can fail in a temperature range of 200-400 ℃ in the formed coke dry distillation process after pulverized coal molding, the transition time of the hot-state binder does not take effect, and the time is the stage at which the formed coke is most easily crushed; the innovation point of the invention is to provide the alumina transition state binder which can act in the temperature range of 200-400 ℃, and the binder and the pulverized coal form firm chemical bond combination, thereby avoiding the crushing of clean formed coke caused by pressure bearing and self expansion or compression in the forming process of the formed coke at the temperature stage.
Compared with the prior art, the method for producing the clean formed coke based on the alumina transition-state binder has the advantages and positive effects that the alumina transition-state binder adopted in the method has wide and rich raw material sources and low price, has the effects of cold and hot binders, has the binding effect before the cold binder fails and the hot binder acts in the pyrolysis process, and ensures the forming rate of materials in a dry distillation furnace and the strength of the formed coke.
The invention realizes the high-efficiency utilization of the low-order slack coal and improves the utilization value of the slack coal.
Detailed Description
The following further describes the embodiments of the present invention.
Example 1
The technical scheme of the method for producing the clean formed coke based on the alumina transition state binder is implemented, and the specific method is implemented as follows:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O398.4wt%, metakaolin: activity 1000mg lime/g, silica SiO296wt% of pregelatinized starch: viscosity 1000mpa.s, limestone CaO56wt% and coal liquefaction residue: residual oil + asphaltene 80 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 20kg of crushed silica, 20kg of crushed limestone and 50kg of crushed coal liquefaction residues, weighing 20kg of alumina, 10kg of metakaolin and 10kg of pregelatinized starch, mixing the materials together in sequence, and stirring and mixing uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the fifthly-entering furnace end coal is the blended coal, and the quality indexes are as follows: dry ashless based volatile Vdaf30.0wt%, dry basis ash content Ad13.5 wt.% dry-fixed carbon FCd59.1% by weight, total sulfur S on a dry basist,d1.46wt%；
Sixthly, crushing the mixed coal to be-3 mm, uniformly mixing the crushed mixed coal with the alumina transition state binder, performing cold press molding, selecting the molding pressure to be 15MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 900 ℃, performing dry distillation for 2 hours, discharging the red hot furnace burden, and cooling to the normal temperature through a coke quenching process to obtain the clean type coke, wherein the weight ratio of the alumina transition state binder to the mixed coal is 10: 100.
Comparative example 1
The coal charge is prepared by crushing the same blended coal to-3 mm without adding an alumina transition state binder, uniformly mixing the crushed blended coal with the binder, performing cold press molding, selecting the molding pressure of 15MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 900 ℃, wherein the dry distillation time is 2h, discharging the red hot furnace charge out of the furnace, and cooling to normal temperature through a coke quenching process to obtain the contrast coke.
The compressive strength, forming rate and final rate indexes of the obtained clean formed coke and the coke for comparison were measured in a Linan Zhonglu Chang YAW-300D type strength tester and a Xinxiangchen Wei YBS-1000 type screening tester, and the test results are shown in the following table 1.
TABLE 1 comparison of compressive Strength, Molding Rate and end Rate indexes
Example 2
The technical scheme of the method for producing the clean formed coke based on the alumina transition state binder is implemented, and the specific method is implemented as follows:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O398.5wt%, metakaolin: activity 1100mg lime/g, silica SiO296.6wt% of pregelatinized starch: viscosity 900mpa.s, limestone CaO54wt% and coal liquefaction residue: residual oil + asphaltene 75 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
weighing 16kg of crushed silica, 17.5kg of limestone and 52.5kg of coal liquefaction residues respectively according to the parts by weight, weighing 22.5kg of alumina, 9kg of metakaolin and 12.5kg of pregelatinized starch, mixing the materials together in sequence, and stirring and mixing the materials uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the fifthly-entering furnace end coal is the blended coal, and the quality indexes are as follows: dry ashless based volatile Vdaf29.0wt%, dry basis ash Ad12.4 wt.% dry fixed carbon FCd61.2 wt.%, dry basis, total sulfur St,d0.97wt%；
Sixthly, crushing the blended coal to be-3 mm, uniformly mixing the crushed blended coal with the alumina transition state binder, performing cold press molding, selecting the molding pressure to be 14MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 850 ℃, wherein the dry distillation time is 2.5 hours, discharging the red hot furnace burden out of the furnace, and cooling to the normal temperature through a coke quenching process to obtain the clean formed coke, wherein the weight ratio of the alumina transition state binder to the blended coal is 15: 100.
Comparative example 2
The coal charge is prepared by crushing the same blended coal to-3 mm without adding alumina transition state binder, uniformly mixing the crushed blended coal with the binder, performing cold press molding, selecting the molding pressure to be 14MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 850 ℃, wherein the dry distillation time is 2.5h, discharging the red hot furnace charge out of the furnace, and cooling to normal temperature through a coke quenching process to obtain the control coke.
In the YaW-300D type strength tester of the Jinan Luchang and the Wei YBS-1000 type screening tester of the Xinxiangchen
The compressive strength, forming rate and end rate indexes of the obtained clean formed coke and the reference coke were measured, and the test results are shown in table 2 below.
TABLE 2 comparison of compressive Strength, Molding Rate and end Rate indexes
| Sample (I) | Compressive strength (N/ball) | Percent formation rate% | End rate/%) |
| Contrast coke | 806 | 74.8 | 16.1 |
| Clean formed coke added with transition state binder | 1020 | 85.2 | 8.6 |
Example 3
The technical scheme of the method for producing the clean formed coke based on the alumina transition state binder is implemented, and the specific method is implemented as follows:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O398.6wt%, metakaolin: activity 1200mg lime/g, silica SiO297.2wt% and pregelatinized starch: viscosity 800mpa.s, limestone CaO53wt% and coal liquefaction residue: residual oil + asphaltene 70 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 12kg of crushed silica, 15kg of limestone and 55kg of coal liquefaction residues according to the parts by weight, weighing 25kg of alumina, 8kg of metakaolin and 15kg of pre-gelatinized starch, mixing the materials together in sequence, and stirring and mixing the materials uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the fifthly-entering furnace end coal is the blended coal, and the quality indexes are as follows: dry ashless based volatile Vdaf32.0wt%, dry basis ash Ad11.7wt%, fixed carbon FC on a dry basisd59.2 wt.% of dryRadical sulfur St,d0.84wt%；
Sixthly, crushing the mixed coal to be-3 mm, uniformly mixing the crushed mixed coal with the alumina transition state binder and the alumina transition state binder according to the weight ratio of 20: 100, performing cold press molding, wherein the molding pressure is 13MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 800 ℃, wherein the dry distillation time is 3h, discharging the red hot furnace burden out of the furnace, and cooling the red hot furnace burden to normal temperature through a coke quenching process to obtain the clean type coke.
Comparative example 3
The coal charge is prepared by crushing the same blended coal to-3 mm without adding an alumina transition state binder, uniformly mixing the crushed blended coal with the binder, performing cold press molding, selecting the molding pressure to be 13MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 800 ℃, wherein the dry distillation time is 3h, discharging the red hot furnace charge out of the furnace, and cooling to the normal temperature through a coke quenching process to obtain the control coke.
The compressive strength, forming rate and end rate indexes of the obtained clean formed coke and the coke for comparison were measured in a Linan Zhonglu Chang YAW-300D type strength tester and a Xinxiangchen Wei YBS-1000 type screening tester, and the test results are shown in the following Table 3.
TABLE 3 compressive Strength, Molding Rate and end Rate indexes
| Sample (I) | Compressive strength (N/ball) | Percent formation rate% | End rate/%) |
| Contrast coke | 860 | 75.2 | 15.6 |
| Clean formed coke added with transition state binder | 1280 | 88.2 | 7.9 |
Example 4
The technical scheme of the method for producing the clean formed coke based on the alumina transition state binder is implemented, and the specific method is implemented as follows:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O398.7wt%, metakaolin: activity 1300mg lime/g, silica SiO297.8wt% of pregelatinized starch: viscosity 700mpa.s, limestone CaO52wt% and coal liquefaction residue: residual oil + asphaltenes 65 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 8kg of crushed silica, 12.5kg of limestone and 57.5kg of coal liquefaction residues according to the parts by weight, weighing 27.5kg of alumina, 7kg of metakaolin and 17.5kg of pregelatinized starch, mixing the materials together in sequence, and stirring and mixing the materials uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the fifthly-entering furnace end coal is the blended coal, and the quality indexes are as follows: dry ashless based volatile Vdaf25.0wt%, dry basis ash Ad14.1 wt.%, fixed carbon FC on a dry basisd63.2 wt.%, dry basis, total sulfur St,d1.23wt%；
Sixthly, crushing the mixed coal to be-3 mm, uniformly mixing the crushed mixed coal with the alumina transition state binder and the alumina transition state binder according to the weight ratio of 25: 100, performing cold press molding, selecting the molding pressure to be 12MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 700 ℃, wherein the dry distillation time is 3.5 hours, discharging the red hot furnace burden out of the furnace, and cooling the red hot furnace burden to the normal temperature through a coke quenching process to obtain the clean type coke.
Comparative example 4
The coal charge is prepared by crushing the same blended coal to-3 mm without adding an alumina transition state binder, uniformly mixing the crushed blended coal with the binder, performing cold press molding, selecting the molding pressure to be 12MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 700 ℃, wherein the dry distillation time is 3.5h, discharging the red hot furnace charge out of the furnace, and cooling to the normal temperature through a coke quenching process to obtain the control coke.
The compressive strength, forming rate and end rate indexes of the obtained clean formed coke and the coke for comparison were measured in a Linan Zhonglu Chang YAW-300D type strength tester and a Xinxiangchen Wei YBS-1000 type screening tester, and the test results are shown in the following table 4.
TABLE 4 comparison of compressive Strength, Molding Rate and end Rate indexes
Example 5
The technical scheme of the method for producing the clean formed coke based on the alumina transition state binder is implemented, and the specific method is implemented as follows:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O398.8wt%, metakaolin: activity 1400mg lime/g, silica SiO298.5wt%, pregelatinized starch: viscosity 600mpa.s, limestone CaO51wt% and coal liquefaction residue: 60wt% of residual oil and asphaltene;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 5kg of crushed silica, 10kg of crushed limestone and 60kg of coal liquefaction residues, further weighing 30kg of alumina, 5kg of metakaolin and 20kg of pre-gelatinized starch, mixing the materials together in sequence, and stirring and mixing uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the fifthly-entering furnace end coal is the blended coal, and the quality indexes are as follows: dry ashless based volatile Vdaf34.0wt%, dry basis ash Ad15.0 wt.%, dry basis fixed carbon FCd55.4 wt.%, dry basis, total sulfur St,d0.70wt%；
Sixthly, crushing the mixed coal to be-3 mm, uniformly mixing the crushed mixed coal with the alumina transition state binder and the alumina transition state binder according to the weight ratio of 30: 100, performing cold press molding, selecting the molding pressure to be 10MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 600 ℃, wherein the dry distillation time is 4h, discharging the red hot furnace burden out of the furnace, and cooling the red hot furnace burden to normal temperature through a coke quenching process to obtain the clean type coke.
Comparative example 5
The coal charge is prepared by crushing the same blended coal to-3 mm without adding alumina transition state binder, uniformly mixing the crushed blended coal with the binder, performing cold press molding, selecting the molding pressure of 10MPa, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 600 ℃, wherein the dry distillation time is 4h, discharging the red hot furnace charge out of the furnace, and cooling to normal temperature through a coke quenching process to obtain the contrast coke.
The compressive strength, forming rate and end rate indexes of the obtained clean formed coke and the coke for comparison were measured in a Linan Zhonglu Chang YAW-300D type strength tester and a Xinxiangchen Wei YBS-1000 type screening tester, and the test results are shown in the following Table 5.
TABLE 5 comparison of compressive Strength, Molding Rate and end Rate indexes
| Sample (I) | Compressive strength (N/ball) | Percent formation rate% | End rate/%) |
| Contrast coke | 817 | 74.9 | 15.8 |
| Clean formed coke added with transition state binder | 1100 | 83.6 | 8.8 |
Claims (2)
1. A method for producing clean formed coke based on alumina transition state binder, the transition state binder acts in the temperature range of 200-400 ℃, and is characterized in that: the method for producing the clean formed coke is carried out according to the following steps:
the method comprises the steps of selecting a raw material composition of an alumina transition state binder and adopting alumina Al as a quality index2O3Not less than 98.4wt%, metakaolin: lime and silica SiO with activity not less than 1000 mg/g2Not less than 96wt%, pregelatinized starch: viscosity is more than or equal to 600mPa.s, limestone CaO is more than or equal to 51wt%, and coal liquefaction residue: the residual oil and the asphaltene are more than or equal to 60 wt%;
crushing raw materials of silica, limestone and coal liquefaction residues of the alumina transition state binder respectively until the granularity is less than or equal to 3 mm; alumina, metakaolin and pregelatinized starch for later use;
respectively weighing 5-20 parts of crushed silica, 10-20 parts of limestone and 50-60 parts of coal liquefaction residues, and further weighing 20-30 parts of alumina, 5-10 parts of metakaolin and 10-20 parts of pregelatinized starch, mixing the materials together in sequence, and stirring and mixing the materials uniformly;
fourthly, the mixture is subjected to dry grinding to enable the granularity of the raw materials to be smaller than or equal to 100 meshes, and the mixture is the alumina transition state binder;
the quality indexes of the selected blended coal are as follows: dry ashless based volatile VdafNot less than 25 percent, dry basis ash content AdLess than or equal to 15 percent, fixed carbon FC on dry basisdNot less than 55 percent of total sulfur S on a dry basist,d＜1.5%；
Sixthly, crushing the blended coal to 3mm, uniformly mixing the crushed blended coal with the alumina transition state binder, performing cold press molding, selecting the molding pressure to be 10-15MPa, enabling the molded coal strength to meet the requirement of being more than 800N/ball under the molding pressure, performing dry distillation on the prepared molded coal in a vertical dry distillation furnace at the temperature of 600 plus materials and 900 ℃, enabling the dry distillation time to be 2-4h, discharging the red hot furnace burden, and cooling the red hot furnace burden to normal temperature through a coke quenching process to obtain the clean molded coke.
2. The method for producing clean formed coke based on alumina transition state binder as claimed in claim 1, wherein: the main strength indexes of the clean formed coke are as follows: the compressive strength is 800N/ball-2000N/ball, the forming rate is more than 80 percent, and the final rate is less than 10 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460314.2A CN110317651B (en) | 2019-05-30 | 2019-05-30 | Method for producing clean formed coke based on alumina transition state binder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460314.2A CN110317651B (en) | 2019-05-30 | 2019-05-30 | Method for producing clean formed coke based on alumina transition state binder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110317651A CN110317651A (en) | 2019-10-11 |
| CN110317651B true CN110317651B (en) | 2021-05-25 |
Family
ID=68119303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910460314.2A Active CN110317651B (en) | 2019-05-30 | 2019-05-30 | Method for producing clean formed coke based on alumina transition state binder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110317651B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909746A (en) * | 2020-07-08 | 2020-11-10 | 胡军 | Preparation and application method of water-soluble adhesive powder for cold-pressed coke |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8725252D0 (en) * | 1987-10-28 | 1987-12-02 | Coal Industry Patents Ltd | Briquetting process |
| CN101870898B (en) * | 2009-03-02 | 2013-03-20 | 山东省冶金设计院股份有限公司 | Special pressed carbon block for blast-furnace ironmaking as well as manufacturing and using methods thereof |
| CN101619251B (en) * | 2009-07-28 | 2013-01-09 | 中钢集团鞍山热能研究院有限公司 | Moulded coal binder for melt reduction iron making and application thereof |
| JP6041694B2 (en) * | 2012-02-08 | 2016-12-14 | 三菱化学株式会社 | Method for producing coking coal for coke production and method for producing coke |
| CN104004561B (en) * | 2014-06-10 | 2015-10-28 | 中国地质大学（武汉） | A kind of brown coal upgrading binding agent and preparation method thereof and its application |
| CN109423349A (en) * | 2017-08-30 | 2019-03-05 | 常州市绿意管道有限公司 | A kind of composite coal binder |
| CN107828436A (en) * | 2017-11-14 | 2018-03-23 | 太原理工大学 | A kind of method that civilian clean coke is produced using coal directly-liquefied residue |
-
2019
- 2019-05-30 CN CN201910460314.2A patent/CN110317651B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110317651A (en) | 2019-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105567272B (en) | The calcium base barium manganese aluminium compound additive and preparation method of raising domestic coke high-temperature fixed sulfur effect and application | |
| CN105733634B (en) | The calcium base potassium magnesium silicon compound additive and preparation method of raising domestic coke high-temperature fixed sulfur effect and application | |
| CN110746997B (en) | Method for refining metallurgical coke | |
| CN107011961A (en) | Lignite compound additive and preparation method and the application of civilian clean coke ignition temperature can effectively be reduced | |
| CN102453490A (en) | Coal blending method for preparing high-activity high-strength coke | |
| CN105542822A (en) | Hematite composite additive for reducing civil coke ignition temperature, preparing method and application | |
| CN110467953B (en) | Method for producing clean formed coke based on water glass transition state binder | |
| CN110317651B (en) | Method for producing clean formed coke based on alumina transition state binder | |
| CN107099356B (en) | Alumina composite additive for improving civil coke ash melting point, preparation method and application thereof | |
| CN109233883B (en) | Gasified coke mixed with high-proportion low-quality coal and preparation method thereof | |
| CN110452753B (en) | Method for producing clean formed coke based on aluminum dihydrogen phosphate transition state binder | |
| CN107828436A (en) | A kind of method that civilian clean coke is produced using coal directly-liquefied residue | |
| CN101440295A (en) | Method for producing coal gasification formed coke | |
| CN107338066A (en) | A kind of civilian clean coke and its production method | |
| CN101768457B (en) | Non-coal-series composite additive and applications thereof in coke making | |
| CN102863978A (en) | Method for coking with non-coking blind coal | |
| CN102533301B (en) | Coking coal modifier | |
| CN112011379A (en) | Method for producing clean formed coke based on lignin transition state binder | |
| CN102559229A (en) | Jet coal retorting, blending and coking process | |
| CN112899052B (en) | Hydrogen inhibitor and method for producing coke by adding large-proportion high-volatility bituminous coal | |
| CN107828437A (en) | A kind of method that civilian clean coke is produced using coal tar pitch | |
| CN102559228A (en) | Lignite retorting, blending and coking process | |
| CN111471501A (en) | Preparation and application of sodium-based composite auxiliary agent for inhibiting dissipation of combustion smoke dust of civil coke | |
| CN110283621A (en) | A method of improving gasification charred ashes fusing point | |
| CN115141665B (en) | Coke matched with Australian gas coal and coking method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191023 Address after: 030024 Yingze, Shanxi Province, Berlin District, West Street, No. 79, No. Applicant after: Taiyuan University of Technology Applicant after: TAIYUAN GREEN COKE ENERGY CO., LTD. Address before: 030006 No. 3, No. 9, science and Technology Street, hi tech Zone, Shanxi, Taiyuan, 0805 Applicant before: TAIYUAN GREEN COKE ENERGY CO., LTD. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |